This inventor holds 4 USPTO granted patents. Top assignees: Sunbeam Corporation Limited, Oster Corporation. Active years: 1978-1986.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Location History:
- Wauwatosa, WI (US) (1978 - 1980)
- Wauwautosa, WI (US) (1986)
Company Filing History:
Years Active: 1978-1986
Title: The Innovative Contributions of James B Cockroft
Introduction
James B Cockroft is a notable inventor based in Wauwatosa, Wisconsin, who has made significant contributions to the field of motor control technology. With a total of four patents to his name, Cockroft has developed innovative solutions that enhance the functionality and efficiency of household electric appliances.
Latest Patents
One of Cockroft's latest patents is a motor speed control circuit designed for closed-loop control of electric motors in household appliances. This circuit utilizes a coil placed near a fan connected to the motor, generating a time-varying signal in response to the fan's rotation. A comparator connected to the coil produces a rectangular wave with a frequency proportional to the coil signal. This rectangular wave is then converted into a D.C. signal, which is compared to a reference signal to produce an error signal that controls the motor's speed through a thyrister.
Another significant patent is the speed responsive motor control circuit, which is designed for appliances that use a speed adjustment device. This circuit features a governor device that includes a switch contact arrangement connected to a power switching device, such as a TRIAC. The governor's switch contacts open and close based on the motor's rotational speed, allowing for a variable speed control that minimizes low-speed cogging and high-speed hunting problems.
Career Highlights
Throughout his career, James B Cockroft has worked with prominent companies in the industry, including Sunbeam Corporation Limited and Oster Corporation. His experience in these organizations has contributed to his expertise in developing innovative motor control technologies.
Collaborations
Cockroft has collaborated with notable coworkers such as Peter J Ernster and Daniel L Sukow, further enhancing his contributions to the field of motor control.
Conclusion
James B Cockroft's innovative patents and career achievements highlight his significant impact on motor control technology in household appliances. His work continues to influence the industry and improve the functionality of electric motors.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile